Springfield M1A SOCOM, Semi-automatic, 308 Win, 16.25 Carbon Steel Barrel with 1:11 Twist Rate, CQB Composite Stock, 10Rd, Adjustable Sights AA9611 Nearly ten inches shorter than the M1A(TM) standard model, the CQB offers quick and easy handling for defensive use indoors or out. The authoritative .308 chambering with optional 20-round magazines won't leave you wanting more fight-stopping effectiveness.