LRI External Bolt Release for M700

It's one of the most popular receiver upgrades available for the M700: The side bolt release. The LRI release is 100% machined from bar stock 4140 Chromoly steel.  We choose this material because it perfectly balances hardness and durability.  These parts are not as simple as one might initially be lead to believe.  Impact forces applied to the bolt stop's lug surface must be considered, as the energy has to be channeled to the receiver as directly as possible. Our bolt stops are wider than most.  This offers a broader impact surface to the bolt lug.  Doing so reduces the risk of the bolt's lug becoming peened and damaged during its service life of hundreds of thousands of rounds.  For this reason, our bolt stops cannot be installed at the popular canted angle that elevates it above the stock line.  The decision boiled down to two choices; convenience of installation or reliability. The balance of hardness and toughness of the bolt stop has to be measured against the hardness of t