The ABR has about .95 of travel with the short dowel and 1.48 with the long dowel.
33XC and larger will need the Hardened Dowels PRS use requires Hardened Dowels Direct Bolt On application: MPA BA: Competition, Hybrid, ESR, Evolution, Lite, Ultra Lite, and Bergara Premier - Short Dowels (The Long dowels will require milling) Modifications Required: ORYX Chassis - (Long Dowels) If your chassis does not have the slot for the M-Lok - we suggest to reduce height added to the rear stock - that you directly bolted onto the lower stock without adding a picatinny rail. The Flat mount ABR (Patented) will directly bolt on to the MPA BA, Hybrid, ESR and Bergara Premier Competition with an MPA Chassis models and it is supplied with the proper length bolts (and the short dowels).