If a thread is titled "worst gun" or "favorite gun" someone
is bound to mention, curse or praise the AR7 Explorer.
I have a Cosa Mesa Armalite (pegasus logo) AR7 that works
well and a Charter Arms AR7 Explorer II pistol that is ...
interesting. Nice basis of a "space gun": I added a sling,
long eye relief pistol scope sight and a laser.
When there are problems with the AR7, they usually fall into
predictable categories:
1) the magazine feed lips are sprung or bent;
2) the feed ramp (on the magazine) is bent;
3) ammo is not roundnosed;
4) ammo is wimpy bulk-pack;
5) chamber has been peened by after-last-shot click-oops-I-am-dry;
6) chamber has been peened by dry fire;
7) chamber has been peened by 100s or 1000s of extractor impacts.
Number 8 came to me when I tried firing my AR7 barreled action
without the shoulderstock: if the buttstock is not held rigidly
to the shoulder, the bolt will not recoil correctly.
Veteran pistol shooters are aware of the phenomenon known as
"limp wristing" an auto pistol and causing it to jam;
AR7s seem to be subject to "weak shouldering" and jamming: the bolt
needs something solid and immobile to recoil against.