The A3 Industries ALM Adjustable Length Modular Folding Braces 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. FeaturesSure-Lok folding 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 in 3 positions and can be flipped for extra adjustment3-position vertical height adjustments on cheek riser - 7/8", 1-1/8", 1-3/8"