At various times, conversion kits were sold allowing the pistol to fire other rounds, including .45 ACP, 10 mm Auto, and .357 Magnum.

The heavy spring, combined with the greater inertia of the massive slide, results in a manageable recoil impulse without resorting to the gas operation of the Desert Eagle and Wildey designs.

The absence of any small, easily fouled gas ports makes the LAR Grizzly capable of firing cast lead bullets reliably.

The Grizzly pistol design does not utilize the double-tapered barrel tenon[3] accuracy enhancement patented by Perry Arnett.

Some parts however are not interchangeable due to the increased front-to-rear depth of the magazine well: Perry Arnett Patents at the USPTO related to the LAR Grizzly pistol: