Welcome to T22. My Colt M4 OPS came with a quad rail so I never had any need to try any others out. But I'm sure lots of fellow Colteers here have done some swapping and will be able to point you in the right direction.
The PPS 22 (made in Italy) has been offered by different companies over the years, all the same rifle from the same manufacturer. I purchased one imported by Puma Arms a few years back and it is one of the finest tactical 22s I own, although my metal 50 round drum refused to work. I hear the new BDM polymer drum mags work as advertised.
You know, I hate to be a spoil sport, this being the tactical22 website and all, but, after owning two Umarex firearms I can say that I'm not a fan of the brand. Especially after getting the chance to compare them to other makers.
The Hi-Point .380 and 9mm pistols and all the carbines are mfg by Beemiller. The Hi-Point .40S&W pistols are mfg by Iberia. The Hi-Point .45ACP pistols are mfg. by Haskell. All are distributed by MKS Supply who also distributes Chiappa Firearms. They are all the least expensive firearms in their classes on the US market. These firearms have also been sold under these mfgs names in the past.
Two Polish deer hunting buddies are dragging their freshly killed 10 point buck through the woods by it's antlers. The antlers are hanging up on every branch and bush on the way making headway very slow. After a while they come across another hunter who tells them that if they drag their buck by his hind legs the rack won't get hung up on every thing they pass. They thanked the hunter and gave it a try. After a while one of the Polish hunters looked at the other and said, "damn, that guy was right. It IS much easier to drag a buck by his hind legs." The other replied, "yeah, but we're getting farther from the truck with every step."
We've sold a ton of Hi-Points over the years with few complaints. That said I'm definitely not a Hi-Point fan. I just couldn't trust my life to the cheapest parachute made and I just can't trust my life to the cheapest defensive firearm made. As far as a fun gun goes, a clunky old Hi-Point just doesn't appeal to me as entertainment. But if a defensive firearm is needed and you're on a very strict budget, well, any gun is far superior to no gun.
We have two of them in stock and they aren't too bad looking. I've owned two mini 14s (non-tactical) and both were easily out shot by my ARs, so, my choice would be an AR every time.
Absolutly, chamber to muzzle if possible. Screw together rods tend to unscrew a little while pushing and pulling through the bore due to the rifling, exposing the bore to the sharp edges of the rod sections at the joints. Not a good thing, even with aluminum rods. One piece rods or pull through kits only. I have the same Otis and it's a comprehensive, safe and effective kit.