SIG Stock Adapter
Fits SIG 55X and 522 rifles
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 buffer tube and stock
Fits any AR-15 stock, including the Magpul UBR stock. Fits Commercial and MIL-spec buffer tubes.
For "Ban States"
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.
About Us
Pistol Caliber AR-15
We are the original designed for pistol caliber AR-15 manufacturer
Innovation is motovation
We put innovation first, and we focus on always evolving
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