Description The Gen 4 adjustable bolt weight allows the bolt weight to be fine tuned by adding 1.3oz to 1.8oz of weight (or up to 2.2oz using lead internal weights – sold separately). If your barrel is less than 12″ long or you use subsonic ammo, the deluxe adjustable bolt weight might be a better fit. Includes aluminum and steel internal weights, lead available here. Please note: There are a lot of variables in cycling of the AR22 platform, with ammunition selection being the largest of those variables. Significantly reduced power ammunition (CCI quiet, etc.) is generally not recommended and tuning the system for reliable cycling with your particular load may be required. An adjustable weight is recommended for use with the widest range of ammo, from subsonic ammunition through hyper velocity. See our FAQ, or contact us for questions on your particular application. The weights are designed to fit dedicated rifles and conversion kits with a BoreBuddy/CMMG/RTB/PSA style bolt. Our high frame rate video below shows the effects of adding of each weight type in slow motion.
