I recently bought a tipman m4 22 for my youngest granddaughter to shoot pins and steel challenge. after breaking it in with a Bushnell trs 25 with 4moa dot I decided to try putting a scope on it to test for accuracy. as for reliability I tried rem thunderbolts, fed auto match (several of my 22 will not function with this), Winchester T22(mil target ammo), CCi standard velocity, CCI mini mags, and Aguila standard velocity. I had no failures that could not be attribute to ammo malfunction. there were a few fail to fire but they had a deep indent on the rim. As for accuracy. the first time I had it out with the red dot I was hitting a 4inch steel plate at 100 yrds with no problem. my 8yr old granddaughter was hitting pretty much everything she shot at. After my first range trip I decided to mount a scope and see what I could get out of for accuracy. The win t22 grouped 10 rounds in less that 1.25 in at 50yards. the cci mini mags around 2 in. the bulk was all under 3inch. In recap the good it functioned 100% with everything I fed it, accuracy was better then I expected, controls are all ar 15. Factory Iron sights are standard AR BUS and stay zeroed after several folding and redeploying. Only downside I can see is the milspec trigger. I will be replacing it, it functioned fine but the 6+pound gritty pull and long rest and overtravel just don't cut it for me. Overall I like it. I am impressed with the reliability and accuracy of it especially for the cost.