I am fairly new to air guns. Have several but not done a lot of repairs or troubleshooting. One of our first was a DAR gen 3. Would not hold pressure and we had to eventually change regulator after the one DAR repaired did the same thing. Had been working fine till magazine got stuck. We thought it was a pellet stuck but could not get it out. It would not cock either. Took hammer spring out and piece below did not come out but seemed to be pushed down in. I was able to cock and when I put the hammer spring back in it fires about twice then will not cock again. Can't find any manual or help. Would appreciate any advice or help. Thanks Tammy