Crosman full auto DPMS

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Today I bought this Crosman DPMS Panther Arms SBR, cheap. It's the first one I'm had actually seen.
 
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Today I bought this Crosman DPMS Panther Arms SBR, cheap. It's the first one I'm had actually seen.
These full auto bb guns are a blast to shoot. I looked at the DPMS and thinking of all the co2 I would go through shooting it I bought the Barra 400e polymer. It is something how similar these guns look, the cocking handle, the mag release, the sights the mag and safety switch. Mark

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Mine has a problem. The spring loaded bb follower is supposed to slide down far enough to latch open so BBs can be loaded thru the round hole. However, something is preventing the square latch thingie from traveling all the way to the bottom and latching. So it is very difficult to hold the little square thing down, under spring pressure while loading BBs into the hole. I guess I'll disassemble the magazine and check it out. I've seen on the 'net that some people have had problems getting bbs in between the coils of the spring. If that is the problem with mine the bbs must be in the spring below the square notch.
 
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Mine has a problem. The spring loaded bb follower is supposed to slide down far enough to latch open so BBs can be loaded thru the round hole. However, something is preventing the square latch thingie from traveling all the way to the bottom and latching. So it is very difficult to hold the little square thing down, under spring pressure while loading BBs into the hole. I guess I'll disassemble the magazine and check it out. I've seen on the 'net that some people have had problems getting bbs in between the coils of the spring. If that is the problem with mine the bbs must be in the spring below the square notch.
The Barra had a problem with the mag also. I called Barra and was told to loosen one screw half a turn and it fixed the problem. The mag would not go onto the piece attached to the barrel. loosened the screw up and now it fits tight with no play and feeds with no problems. I have read also that spraying wd40 or something similar will help with loading on the Barra. Mark
 
I have checked it out and it appears that the spring is too long and is being fully compressed before the latch can reach the notch it is supposed to lock into. Not only will the slide not lock into the loading position but the bb follower will not clear the hole for the bbs to drop in. I cou;ld cut 3/8 - 1/2 inch of compressed length off of the spring and fix the problem but I'm concerned that then the spring might not be strong enough to feed the bbs properly. I'd like to know that I can get a replacement spring before I cut the original.