Our SIG stock adapter fits US and Swiss made 55x and 522 rifles.
US made: 556 Classic, 556R, 556xi, 522
Swiss made: SG 550, SG 551, SG 552, SG 553
Fits any AR-15 stock, including the Magpul UBR stock. Fits Commercial and MIL-spec buffer tubes.
Optional pin can be inserted to fix the stock so it cannot fold. This makes the rifle compliant with the laws in states that restrict folding stocks.
We are the original designed for pistol caliber AR-15 manufacturer
We put innovation first, and we focus on always evolving
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We love our customers, so we are working hard to design and manufacture new products every day.
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Sat | Closed | |
Sun | Closed |
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The original pistol caliber AR-15 billet lower