This quirky little adapter acts as an extended grip and lets you run 30-round CYMA shot shells in your TM LCP/LCPII. A lot of the guys running these pistols are using them as a MK23 replacement for close work when sniping. To install this adapter, you'll need a short LCP/LCPII magazine. Fit the included O-ring to the base of the HPA adapter. Remove the baseplate of the gas mag, then use a hand clamp to compress the adapter onto the magazine shell, lining up and inserting the pins (fit the included O-ring ). Push the small included single-stack block into the magazine, covering the BB loading hole (this may be glued in place to prevent loss) We include a 3mm dowel pin to allow leverage on the adapter when clamping. Naturally FPS will still be as low as on green/red gas due to the very short barrel, though I think this can likely be solved with one of the longer barrels available for the LCP2(please let me know if you've got one of these!) Drop the line on the opposite side to your hand on the grip and it can be held really nicely. You will also be provided three feed tubes of different lengths. Sometimes, due to manufacturing tolerances of the shells, you may need to swap out the feed tube already pre-fitted to give the best feeding results.