Steam player countSteam18,139
Tarkov
MCX-SPEAR 11 inch M-LOK handguard

MCX-SPEAR 11 inch M-LOK handguard

SPEAR 11"
Last
20,000 ₽
Min 24h
—
Avg 24h
20,000 ₽
Flea offers
1
↑0 ↓0 /day
Profit / limit
-25,305 ₽
-5,061 ₽/pc × 5
No estimated profit
Base price
11,675 ₽
Buy
Peacekeeper
24,007 ₽
Peacekeeper LL4 · 126 $
limit 5
Trader buyback
Mechanic
5,253 ₽
Mechanic
Trader buyback
Prapor
4,670 ₽
Prapor
Trader buyback
Ref
4,670 ₽
Ref
Trader buyback
Skier
4,553 ₽
Skier
Trader buyback
Peacekeeper
4,203 ₽
Peacekeeper
Trader buyback
Fence
2,802 ₽
Fence
How profit is calculated
Buy / item24,007 ₽
Estimated sell / item20,000 ₽
Fee / item1,054 ₽
Profit / item-5,061 ₽

Restock profit = profit per item × the full limit of the selected trader offer. Hideout fee discounts are excluded. Market activity reflects changes in prices and listings, not completed sales.

Stats

Weight0.43 kg
Size3×1
Ergonomics modifier+16

Price chart

The line shows interval averages. Times are UTC.072,500145,00010/06/2603/07/2626/07/2618/08/2611/09/26035Average offer count: 1 10/06/2026, 00:00:00 — 10/06/2026, 23:59:59 UTCAverage offer count: 1 11/06/2026, 00:00:00 — 11/06/2026, 23:59:59 UTCAverage offer count: 1 12/06/2026, 00:00:00 — 12/06/2026, 23:59:59 UTCAverage offer count: 2 13/06/2026, 00:00:00 — 13/06/2026, 23:59:59 UTCAverage offer count: 2 14/06/2026, 00:00:00 — 14/06/2026, 23:59:59 UTCAverage offer count: 2 15/06/2026, 00:00:00 — 15/06/2026, 23:59:59 UTCAverage offer count: 2 16/06/2026, 00:00:00 — 16/06/2026, 23:59:59 UTCAverage offer count: 1 17/06/2026, 00:00:00 — 17/06/2026, 23:59:59 UTCAverage offer count: 1 18/06/2026, 00:00:00 — 18/06/2026, 23:59:59 UTCAverage offer count: 1 19/06/2026, 00:00:00 — 19/06/2026, 23:59:59 UTCAverage offer count: 1 20/06/2026, 00:00:00 — 20/06/2026, 23:59:59 UTCAverage offer count: 1 21/06/2026, 00:00:00 — 21/06/2026, 23:59:59 UTCAverage offer count: 1 22/06/2026, 00:00:00 — 22/06/2026, 23:59:59 UTCAverage offer count: 1 23/06/2026, 00:00:00 — 23/06/2026, 23:59:59 UTCAverage offer count: 1 24/06/2026, 00:00:00 — 24/06/2026, 23:59:59 UTCAverage offer count: 1 25/06/2026, 00:00:00 — 25/06/2026, 23:59:59 UTCAverage offer count: 1 26/06/2026, 00:00:00 — 26/06/2026, 23:59:59 UTCAverage offer count: 1 27/06/2026, 00:00:00 — 27/06/2026, 23:59:59 UTCAverage offer count: 1 28/06/2026, 00:00:00 — 28/06/2026, 23:59:59 UTCAverage offer count: 1 29/06/2026, 00:00:00 — 29/06/2026, 23:59:59 UTCAverage offer count: 4 30/06/2026, 00:00:00 — 30/06/2026, 23:59:59 UTCAverage offer count: 3 01/07/2026, 00:00:00 — 01/07/2026, 23:59:59 UTCAverage offer count: 4 02/07/2026, 00:00:00 — 02/07/2026, 23:59:59 UTCAverage offer count: 4 03/07/2026, 00:00:00 — 03/07/2026, 23:59:59 UTCAverage offer count: 2 04/07/2026, 00:00:00 — 04/07/2026, 23:59:59 UTCAverage offer count: 3 05/07/2026, 00:00:00 — 05/07/2026, 23:59:59 UTCAverage offer count: 1 06/07/2026, 00:00:00 — 06/07/2026, 23:59:59 UTCAverage offer count: 1 07/07/2026, 00:00:00 — 07/07/2026, 23:59:59 UTCAverage offer count: 1 08/07/2026, 00:00:00 — 08/07/2026, 23:59:59 UTCAverage offer count: 1 09/07/2026, 00:00:00 — 09/07/2026, 23:59:59 UTCAverage offer count: 1 10/07/2026, 00:00:00 — 10/07/2026, 23:59:59 UTCAverage offer count: 1 11/07/2026, 00:00:00 — 11/07/2026, 23:59:59 UTCAverage offer count: 1 12/07/2026, 00:00:00 — 12/07/2026, 23:59:59 UTCAverage offer count: 1 13/07/2026, 00:00:00 — 13/07/2026, 23:59:59 UTCAverage offer count: 1 14/07/2026, 00:00:00 — 14/07/2026, 23:59:59 UTCAverage offer count: 1 15/07/2026, 00:00:00 — 15/07/2026, 23:59:59 UTCAverage offer count: 2 16/07/2026, 00:00:00 — 16/07/2026, 23:59:59 UTCAverage offer count: 2 17/07/2026, 00:00:00 — 17/07/2026, 23:59:59 UTCAverage offer count: 1 18/07/2026, 00:00:00 — 18/07/2026, 23:59:59 UTCAverage offer count: 1 19/07/2026, 00:00:00 — 19/07/2026, 23:59:59 UTCAverage offer count: 2 20/07/2026, 00:00:00 — 20/07/2026, 23:59:59 UTCAverage offer count: 3 21/07/2026, 00:00:00 — 21/07/2026, 23:59:59 UTCAverage offer count: 4 27/07/2026, 00:00:00 — 27/07/2026, 23:59:59 UTCAverage offer count: 5 28/07/2026, 00:00:00 — 28/07/2026, 23:59:59 UTCAverage offer count: 3 29/07/2026, 00:00:00 — 29/07/2026, 23:59:59 UTCAverage offer count: 1 30/07/2026, 00:00:00 — 30/07/2026, 23:59:59 UTCAverage offer count: 1 31/07/2026, 00:00:00 — 31/07/2026, 23:59:59 UTCAverage offer count: 1 01/08/2026, 00:00:00 — 01/08/2026, 23:59:59 UTCAverage offer count: 3 02/08/2026, 00:00:00 — 02/08/2026, 23:59:59 UTCAverage offer count: 3 03/08/2026, 00:00:00 — 03/08/2026, 23:59:59 UTCAverage offer count: 1 04/08/2026, 00:00:00 — 04/08/2026, 23:59:59 UTCAverage offer count: 1 05/08/2026, 00:00:00 — 05/08/2026, 23:59:59 UTCAverage offer count: 1 06/08/2026, 00:00:00 — 06/08/2026, 23:59:59 UTCAverage offer count: 1 07/08/2026, 00:00:00 — 07/08/2026, 23:59:59 UTCAverage offer count: 1 08/08/2026, 00:00:00 — 08/08/2026, 23:59:59 UTCAverage offer count: 1 09/08/2026, 00:00:00 — 09/08/2026, 23:59:59 UTCAverage offer count: 1 10/08/2026, 00:00:00 — 10/08/2026, 23:59:59 UTCAverage offer count: 1 11/08/2026, 00:00:23 UTCAverage offer count: 1 12/08/2026, 00:00:25 UTCAverage offer count: 1 12/08/2026, 12:33:22 UTCAverage offer count: 2.57 12/08/2026, 20:23:23 — 13/08/2026, 08:22:59 UTCAverage offer count: 2.33 13/08/2026, 10:20:50 — 13/08/2026, 20:30:52 UTCAverage offer count: 1.46 13/08/2026, 22:20:51 — 14/08/2026, 10:20:52 UTCAverage offer count: 1 14/08/2026, 12:20:53 — 15/08/2026, 00:00:53 UTCAverage offer count: 1 16/08/2026, 00:00:54 UTCAverage offer count: 1 17/08/2026, 00:00:55 UTCAverage offer count: 1 18/08/2026, 00:00:57 UTCAverage offer count: 1 18/08/2026, 14:40:57 UTCAverage offer count: 1 19/08/2026, 00:00:57 UTCAverage offer count: 1 19/08/2026, 10:40:58 — 19/08/2026, 20:40:58 UTCAverage offer count: 1 20/08/2026, 00:00:59 UTCAverage offer count: 1 21/08/2026, 00:01:01 UTCAverage offer count: 1 22/08/2026, 00:01:01 UTCAverage offer count: 1 23/08/2026, 00:01:02 UTCAverage offer count: 1 23/08/2026, 19:01:02 UTCAverage offer count: 1 23/08/2026, 23:11:03 — 24/08/2026, 03:01:03 UTCAverage offer count: 1 25/08/2026, 00:01:04 UTCAverage offer count: 1 26/08/2026, 00:01:06 UTCAverage offer count: 1 27/08/2026, 00:01:06 UTCAverage offer count: 1 27/08/2026, 17:11:08 — 28/08/2026, 00:01:08 UTCAverage offer count: 1 29/08/2026, 00:01:09 UTCAverage offer count: 1 30/08/2026, 00:01:10 UTCAverage offer count: 1 31/08/2026, 00:08:49 UTCAverage offer count: 1 01/09/2026, 00:02:49 UTCAverage offer count: 1 02/09/2026, 00:02:51 UTCAverage offer count: 1 03/09/2026, 00:02:53 UTCAverage offer count: 1 04/09/2026, 00:02:54 UTCAverage offer count: 1 05/09/2026, 00:02:54 UTCAverage offer count: 1 06/09/2026, 00:02:59 UTCAverage offer count: 1 06/09/2026, 01:32:14 UTCAverage offer count: 1 07/09/2026, 00:07:40 UTCAverage offer count: 1 08/09/2026, 00:05:23 UTCAverage offer count: 1 08/09/2026, 18:53:07 UTCAverage offer count: 1 08/09/2026, 20:53:08 — 09/09/2026, 00:53:08 UTCAverage offer count: 1 10/09/2026, 00:03:18 UTCAverage offer count: 1 11/09/2026, 00:06:06 UTCAverage price: 55,555 ₽ Price range: 55,555 – 55,555 ₽ 10/06/2026, 00:00:00 — 10/06/2026, 23:59:59 UTCAverage price: 55,555 ₽ Price range: 55,555 – 55,555 ₽ 11/06/2026, 00:00:00 — 11/06/2026, 23:59:59 UTCAverage price: 55,555 ₽ Price range: 55,555 – 55,555 ₽ 12/06/2026, 00:00:00 — 12/06/2026, 23:59:59 UTCAverage price: 55,555 ₽ Price range: 55,555 – 55,555 ₽ 13/06/2026, 00:00:00 — 13/06/2026, 23:59:59 UTCAverage price: 55,555 ₽ Price range: 55,555 – 55,555 ₽ 14/06/2026, 00:00:00 — 14/06/2026, 23:59:59 UTCAverage price: 55,555 ₽ Price range: 55,555 – 55,555 ₽ 15/06/2026, 00:00:00 — 15/06/2026, 23:59:59 UTCAverage price: 54,166 ₽ Price range: 50,000 – 55,555 ₽ 16/06/2026, 00:00:00 — 16/06/2026, 23:59:59 UTCAverage price: 55,555 ₽ Price range: 55,555 – 55,555 ₽ 17/06/2026, 00:00:00 — 17/06/2026, 23:59:59 UTCAverage price: 35,278 ₽ Price range: 15,000 – 55,555 ₽ 18/06/2026, 00:00:00 — 18/06/2026, 23:59:59 UTCAverage price: 17,500 ₽ Price range: 15,000 – 19,999 ₽ 19/06/2026, 00:00:00 — 19/06/2026, 23:59:59 UTCAverage price: 19,999 ₽ Price range: 19,999 – 19,999 ₽ 20/06/2026, 00:00:00 — 20/06/2026, 23:59:59 UTCAverage price: 23,999 ₽ Price range: 19,999 – 28,888 ₽ 21/06/2026, 00:00:00 — 21/06/2026, 23:59:59 UTCAverage price: 28,888 ₽ Price range: 28,888 – 28,888 ₽ 22/06/2026, 00:00:00 — 22/06/2026, 23:59:59 UTCAverage price: 22,194 ₽ Price range: 15,500 – 28,888 ₽ 23/06/2026, 00:00:00 — 23/06/2026, 23:59:59 UTCAverage price: 18,875 ₽ Price range: 15,500 – 20,000 ₽ 24/06/2026, 00:00:00 — 24/06/2026, 23:59:59 UTCAverage price: 25,111 ₽ Price range: 20,000 – 33,333 ₽ 25/06/2026, 00:00:00 — 25/06/2026, 23:59:59 UTCAverage price: 21,999 ₽ Price range: 21,999 – 21,999 ₽ 26/06/2026, 00:00:00 — 26/06/2026, 23:59:59 UTCAverage price: 21,999 ₽ Price range: 21,999 – 21,999 ₽ 27/06/2026, 00:00:00 — 27/06/2026, 23:59:59 UTCAverage price: 21,000 ₽ Price range: 20,000 – 21,999 ₽ 28/06/2026, 00:00:00 — 28/06/2026, 23:59:59 UTCAverage price: 20,000 ₽ Price range: 20,000 – 20,000 ₽ 29/06/2026, 00:00:00 — 29/06/2026, 23:59:59 UTCAverage price: 35,805 ₽ Price range: 20,000 – 55,555 ₽ 30/06/2026, 00:00:00 — 30/06/2026, 23:59:59 UTCAverage price: 29,538 ₽ Price range: 25,000 – 40,000 ₽ 01/07/2026, 00:00:00 — 01/07/2026, 23:59:59 UTCAverage price: 30,849 ₽ Price range: 15,000 – 38,999 ₽ 02/07/2026, 00:00:00 — 02/07/2026, 23:59:59 UTCAverage price: 15,000 ₽ Price range: 15,000 – 15,000 ₽ 03/07/2026, 00:00:00 — 03/07/2026, 23:59:59 UTCAverage price: 11,499 ₽ Price range: 9,999 – 15,000 ₽ 04/07/2026, 00:00:00 — 04/07/2026, 23:59:59 UTCAverage price: 21,296 ₽ Price range: 10,111 – 43,333 ₽ 05/07/2026, 00:00:00 — 05/07/2026, 23:59:59 UTCAverage price: 19,999 ₽ Price range: 19,999 – 19,999 ₽ 06/07/2026, 00:00:00 — 06/07/2026, 23:59:59 UTCAverage price: 19,999 ₽ Price range: 19,999 – 19,999 ₽ 07/07/2026, 00:00:00 — 07/07/2026, 23:59:59 UTCAverage price: 19,999 ₽ Price range: 19,999 – 19,999 ₽ 08/07/2026, 00:00:00 — 08/07/2026, 23:59:59 UTCAverage price: 19,999 ₽ Price range: 19,999 – 19,999 ₽ 09/07/2026, 00:00:00 — 09/07/2026, 23:59:59 UTCAverage price: 19,999 ₽ Price range: 19,999 – 19,999 ₽ 10/07/2026, 00:00:00 — 10/07/2026, 23:59:59 UTCAverage price: 19,999 ₽ Price range: 19,999 – 19,999 ₽ 11/07/2026, 00:00:00 — 11/07/2026, 23:59:59 UTCAverage price: 16,555 ₽ Price range: 13,111 – 19,999 ₽ 12/07/2026, 00:00:00 — 12/07/2026, 23:59:59 UTCAverage price: 13,111 ₽ Price range: 13,111 – 13,111 ₽ 13/07/2026, 00:00:00 — 13/07/2026, 23:59:59 UTCAverage price: 13,111 ₽ Price range: 13,111 – 13,111 ₽ 14/07/2026, 00:00:00 — 14/07/2026, 23:59:59 UTCAverage price: 31,556 ₽ Price range: 13,111 – 50,000 ₽ 15/07/2026, 00:00:00 — 15/07/2026, 23:59:59 UTCAverage price: 35,000 ₽ Price range: 29,999 – 50,000 ₽ 16/07/2026, 00:00:00 — 16/07/2026, 23:59:59 UTCAverage price: 29,166 ₽ Price range: 25,000 – 30,000 ₽ 17/07/2026, 00:00:00 — 17/07/2026, 23:59:59 UTCAverage price: 30,000 ₽ Price range: 30,000 – 30,000 ₽ 18/07/2026, 00:00:00 — 18/07/2026, 23:59:59 UTCAverage price: 35,000 ₽ Price range: 30,000 – 40,000 ₽ 19/07/2026, 00:00:00 — 19/07/2026, 23:59:59 UTCAverage price: 42,222 ₽ Price range: 40,000 – 44,000 ₽ 20/07/2026, 00:00:00 — 20/07/2026, 23:59:59 UTCAverage price: 38,750 ₽ Price range: 29,999 – 42,000 ₽ 21/07/2026, 00:00:00 — 21/07/2026, 23:59:59 UTCAverage price: 86,566 ₽ Price range: 49,000 – 100,000 ₽ 27/07/2026, 00:00:00 — 27/07/2026, 23:59:59 UTCAverage price: 29,367 ₽ Price range: 18,888 – 49,000 ₽ 28/07/2026, 00:00:00 — 28/07/2026, 23:59:59 UTCAverage price: 22,991 ₽ Price range: 19,999 – 25,000 ₽ 29/07/2026, 00:00:00 — 29/07/2026, 23:59:59 UTCAverage price: 24,444 ₽ Price range: 24,444 – 24,444 ₽ 30/07/2026, 00:00:00 — 30/07/2026, 23:59:59 UTCAverage price: 24,444 ₽ Price range: 24,444 – 24,444 ₽ 31/07/2026, 00:00:00 — 31/07/2026, 23:59:59 UTCAverage price: 79,722 ₽ Price range: 24,444 – 135,000 ₽ 01/08/2026, 00:00:00 — 01/08/2026, 23:59:59 UTCAverage price: 82,639 ₽ Price range: 46,111 – 135,000 ₽ 02/08/2026, 00:00:00 — 02/08/2026, 23:59:59 UTCAverage price: 43,481 ₽ Price range: 39,999 – 46,111 ₽ 03/08/2026, 00:00:00 — 03/08/2026, 23:59:59 UTCAverage price: 29,999 ₽ Price range: 20,000 – 39,999 ₽ 04/08/2026, 00:00:00 — 04/08/2026, 23:59:59 UTCAverage price: 20,000 ₽ Price range: 20,000 – 20,000 ₽ 05/08/2026, 00:00:00 — 05/08/2026, 23:59:59 UTCAverage price: 22,667 ₽ Price range: 20,000 – 28,000 ₽ 06/08/2026, 00:00:00 — 06/08/2026, 23:59:59 UTCAverage price: 20,000 ₽ Price range: 20,000 – 20,000 ₽ 07/08/2026, 00:00:00 — 07/08/2026, 23:59:59 UTCAverage price: 20,000 ₽ Price range: 20,000 – 20,000 ₽ 08/08/2026, 00:00:00 — 08/08/2026, 23:59:59 UTCAverage price: 20,000 ₽ Price range: 20,000 – 20,000 ₽ 09/08/2026, 00:00:00 — 09/08/2026, 23:59:59 UTCAverage price: 16,800 ₽ Price range: 13,600 – 20,000 ₽ 10/08/2026, 00:00:00 — 10/08/2026, 23:59:59 UTCAverage price: 13,600 ₽ Price range: 13,600 – 13,600 ₽ 11/08/2026, 00:00:23 UTCAverage price: 13,600 ₽ Price range: 13,600 – 13,600 ₽ 12/08/2026, 00:00:25 UTCAverage price: 55,555 ₽ Price range: 55,555 – 55,555 ₽ 12/08/2026, 12:33:22 UTCAverage price: 42,142.43 ₽ Price range: 35,000 – 50,000 ₽ 12/08/2026, 20:23:23 — 13/08/2026, 08:22:59 UTCAverage price: 32,073.33 ₽ Price range: 29,999 – 36,666 ₽ 13/08/2026, 10:20:50 — 13/08/2026, 20:30:52 UTCAverage price: 26,922.38 ₽ Price range: 26,666 – 29,999 ₽ 13/08/2026, 22:20:51 — 14/08/2026, 10:20:52 UTCAverage price: 26,666 ₽ Price range: 26,666 – 26,666 ₽ 14/08/2026, 12:20:53 — 15/08/2026, 00:00:53 UTCAverage price: 26,666 ₽ Price range: 26,666 – 26,666 ₽ 16/08/2026, 00:00:54 UTCAverage price: 26,666 ₽ Price range: 26,666 – 26,666 ₽ 17/08/2026, 00:00:55 UTCAverage price: 26,666 ₽ Price range: 26,666 – 26,666 ₽ 18/08/2026, 00:00:57 UTCAverage price: 15,555 ₽ Price range: 15,555 – 15,555 ₽ 18/08/2026, 14:40:57 UTCAverage price: 15,555 ₽ Price range: 15,555 – 15,555 ₽ 19/08/2026, 00:00:57 UTCAverage price: 20,000 ₽ Price range: 20,000 – 20,000 ₽ 19/08/2026, 10:40:58 — 19/08/2026, 20:40:58 UTCAverage price: 20,000 ₽ Price range: 20,000 – 20,000 ₽ 20/08/2026, 00:00:59 UTCAverage price: 20,000 ₽ Price range: 20,000 – 20,000 ₽ 21/08/2026, 00:01:01 UTCAverage price: 20,000 ₽ Price range: 20,000 – 20,000 ₽ 22/08/2026, 00:01:01 UTCAverage price: 20,000 ₽ Price range: 20,000 – 20,000 ₽ 23/08/2026, 00:01:02 UTCAverage price: 24,082 ₽ Price range: 24,082 – 24,082 ₽ 23/08/2026, 19:01:02 UTCAverage price: 23,000 ₽ Price range: 23,000 – 23,000 ₽ 23/08/2026, 23:11:03 — 24/08/2026, 03:01:03 UTCAverage price: 23,000 ₽ Price range: 23,000 – 23,000 ₽ 25/08/2026, 00:01:04 UTCAverage price: 23,000 ₽ Price range: 23,000 – 23,000 ₽ 26/08/2026, 00:01:06 UTCAverage price: 23,000 ₽ Price range: 23,000 – 23,000 ₽ 27/08/2026, 00:01:06 UTCAverage price: 30,000 ₽ Price range: 30,000 – 30,000 ₽ 27/08/2026, 17:11:08 — 28/08/2026, 00:01:08 UTCAverage price: 30,000 ₽ Price range: 30,000 – 30,000 ₽ 29/08/2026, 00:01:09 UTCAverage price: 30,000 ₽ Price range: 30,000 – 30,000 ₽ 30/08/2026, 00:01:10 UTCAverage price: 30,000 ₽ Price range: 30,000 – 30,000 ₽ 31/08/2026, 00:08:49 UTCAverage price: 30,000 ₽ Price range: 30,000 – 30,000 ₽ 01/09/2026, 00:02:49 UTCAverage price: 30,000 ₽ Price range: 30,000 – 30,000 ₽ 02/09/2026, 00:02:51 UTCAverage price: 30,000 ₽ Price range: 30,000 – 30,000 ₽ 03/09/2026, 00:02:53 UTCAverage price: 30,000 ₽ Price range: 30,000 – 30,000 ₽ 04/09/2026, 00:02:54 UTCAverage price: 30,000 ₽ Price range: 30,000 – 30,000 ₽ 05/09/2026, 00:02:54 UTCAverage price: 30,000 ₽ Price range: 30,000 – 30,000 ₽ 06/09/2026, 00:02:59 UTCAverage price: 30,000 ₽ Price range: 30,000 – 30,000 ₽ 06/09/2026, 01:32:14 UTCAverage price: 30,000 ₽ Price range: 30,000 – 30,000 ₽ 07/09/2026, 00:07:40 UTCAverage price: 30,000 ₽ Price range: 30,000 – 30,000 ₽ 08/09/2026, 00:05:23 UTCAverage price: 20,000 ₽ Price range: 20,000 – 20,000 ₽ 08/09/2026, 18:53:07 UTCAverage price: 20,000 ₽ Price range: 20,000 – 20,000 ₽ 08/09/2026, 20:53:08 — 09/09/2026, 00:53:08 UTCAverage price: 20,000 ₽ Price range: 20,000 – 20,000 ₽ 10/09/2026, 00:03:18 UTCAverage price: 20,000 ₽ Price range: 20,000 – 20,000 ₽ 11/09/2026, 00:06:06 UTC

Purple: price, ₽; gray: offer count. Lines show interval averages; the band shows the price range. Times are UTC.

Description

An 11 inch handguard for the MCX-SPEAR assault rifle equipped with an M-LOK interface for installation of additional devices and accessories. Manufactured by SIG Sauer.