The A3 Industries ALM, Adjustable Length Modular Folding Stocks, are packed full of features. Offset configurations have 5 length settings, a cheek riser with adjustable height and adjustable mounting positions, and a Quick-disconnect (QD) sling mounting socket - all standard when you buy the ALM folding brace. Machined from 6061 aluminum, the ALM is very sturdy, with cogged connections at each adjustment point. This ensures a very rigid, rattle-free connection at any position. FeaturesHD Steel APEX hinge with 1913 Picatinny interface, manufactured from 17-4 stainless with QPQ Nitride coatingHinge can mount to fold left or right and has rapid-deploy feature5-position adjustable length with cogged locking pointsUser can choose the HD knurled thumb-screws OR low-profile screws for adjustment - both included.Extension arms adjust from 6-1/8"-9-1/2" in lengthPedestal style XENO aluminum cheek riser with injection-molded polymer cheek rest Offset mounted cheek riser adjusts horizontally ...