A3 Industries Adjustable Length Modular Folding Stock Offset Extension A3T Butt-Plate Black 6-1/8in-9-1/2in. Available in straight or offset configurations both variants 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. Specifications for A3 Industries Adjustable Length Modular Folding Stock Offset Extension A3T Butt-Plate: Manufacturer: A3 Industries Color: Black Length: 6 1/8 in Weight: 14 oz Features of A3 Industries Adjustable Length Modular Folding Stock Offset Extension A3T Butt-Plate HD Steel APEX hinge with 1913 Picatinny interface manufactured from 17-4 stainless with QPQ Nitride coating Hinge can mount to fold left or right and has rapid-deploy feature 5-position adjustable length with cogged locking points User can choose the HD knurled thumb-screws OR low-profile screws for adjustment - both included. Your choice of Straight or Offset Extension arm Extension arms adjust from 6-1/8"-9-1/2" in length Pedestal 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 adjustment 3-position vertical height adjustments on cheek riser - 7/8" 1-1/8" 1-3/8" Choice of 4 different Butt-plates all with rubber butt-pads VIS steel Quick-disconnect socket for easy sling mounting - 6 mounting positions Package Contents: A3 Industries Adjustable Length Modular Folding Stock Offset Extension A3T Butt-Plate CHEEK RISER QD SLING MOUNT A3 Industries ALMS-OFF-BP2: Adjustable Length Modular Folding Stock Offset Extension A3T Butt-Plate Black 6-1/8in-9-1/2in