Real steel questions

[Longshot]

I know I could spend time researching these but I figured you lot would know. :D

1, Is there any difference between an M4 and M16 except the obvious length and stock external features?

2, Do H&K USPs have a metal slide and plastic body or metal body?

Cheers in advance.

[hoggy21]

Re: Real steel questions

1) Not as far as i know. Longer barrel and solid stock on M16.

2) The USP is a semi-automatic pistol with a mechanically locked breech using the short recoil method of operation. This rather conventional lock-up system has a large rectangular lug over the barrel’s chamber that rides into and engages the ejection port cut-out in the slide. When a cartridge is fired, pressures generated by the ignited powder drive the cartridge casing back against the breech face on the slide, driving back both the barrel and slide as they remain locked together in the manner described above. After 3 mm (0.12 in) of unrestricted rearward travel, the projectile has left the barrel and gas pressures have dropped to a safe level. A shaped lug on the underside of the barrel chamber comes into contact with a hooked locking block at the end of the steel recoil spring guide rod, lowering the rear end of the barrel and stopping the barrel's rearward movement. The recoil spring assembly is held in place by the slide stop lever’s axis pin and a round cut-out at the front of the slide. For enhanced reliability in high-dust environments, the locking surface on the front top of the barrel’s locking lug is tapered with a forward slope. This tapered surface produces a camming action which assists in positive lock-up in the presence of heavy fouling and debris.
One of the most significant features of the USP is the mechanical recoil reduction system. This system is incorporated into the recoil spring assembly, located below the barrel and consists of a heavy, captive coil spring around the guide rod. Designed primarily to buffer the slide and barrel and reduce recoil effects on the pistol components, the system also lowers the recoil forces felt by the shooter up to 30%. The USP recoil reduction system is insensitive to ammunition types and does not require adjustment or maintenance. It functions effectively in all USP models.[3] Using this same recoil reduction system, one of the related H&K Mk 23 .45 ACP pistols fired more than 30,000 high pressure +P cartridges and 6,000 proof loads without damage or excessive wear to any major components. Abuse and function-testing of USPs have seen more than 20,000 rounds of .40 S&W fired without a component failure. Milspec environmental tests were conducted in high and low temperatures, in mud, immersed in water and in salt spray. In one particular test, a bullet was deliberately lodged in the barrel and another bullet was fired to clear the obstruction. The barrel was successfully cleared with only minor structural deformation and continued to produce consistent groups when test fired for accuracy.[6]
Major metal components on both the USP and Special Operations Pistol are corrosion-resistant. Outside metal surfaces, such as the steel slide are protected by a proprietary "Hostile Environment" nitride finish.[3] Internal metal parts, such as springs, are coated with a Dow Corning anti-corrosion chemical to reduce friction and wear.[7][8]
The USP is composed of a total of 54 parts and is broken down into 7 major components for maintenance and cleaning: the barrel, slide, recoil spring, recoil spring guide rod, the frame, slide stop and magazine. This is done by retracting the slide back to align the slide stop axis pin with the disassembly notch on the left side of the slide and withdrawing the axis pin.



Wikipedia is a good friend of mine....

[kommissarboris]

Re: Real steel questions

wiki, the savour of the internet.

[shadowcaptain]

Re: Real steel questions

M4 is just a carbine version of the m16 - shorter barrel

USP is Polymer frame, metal slide

most airsoft guns are as realistic as the real steal - bar the workings of course although gas guns are VERY similar to real steel

[TheLazyMarksman]

Re: Real steel questions

Some GBBR magwell fit real steel magazines; although I don't think its the case with pistols.

- I know for sure that the WE 1911 magazines are not the same as the real-steel, seems slightly skinnier and taller.

[Abbadon101]

Re: Real steel questions

The M4 is a carbine length M16 (Colt Model 720) adopted by the US DOD in the Mid 90's to replace both the XM177 and CAR-15/Colt Commando's in service, and to replace the issue of side arms to rear echelon units. Then the M4A1 was issued as a SF weapons platform.

The AR-15 family is as follows

M16c- 986 mm Total length, 508 mm Barrel lenght. Fully Automatic.
M16A1 - 986 mm Total length, 508 mm Barrel lenght. Fully Automatic restricted to burst only.
M16A2 - 1006 mm Total length, 508 mm Barrel lenght. Fully Automatic restricted to burst only.
M16A3 - 1006 mm Total length, 508 mm Barrel lenght. Fully Automatic, Flat top receiver.
M16A4 - 1006 mm Total length, 508 mm Barrel lenght. Fully Automatic restricted to burst fire only, Flat top receiver.

M4 - 838 mm (stock extended); 757 mm (stock fully collapsed) Total length, 370 mm Barrel lenght. Fully Automatic restricted to burst fire only, Flat top receiver. (although the first batch had an M16A2 upper receiver)

M4A1 - 838 mm (stock extended); 757 mm (stock fully collapsed) Total length, 370 mm Barrel lenght. Fully Automatic, Flat top receiver.

[Longshot]

Re: Real steel questions

Cheers for the responses gents, I just couldn't be bothered to read through Wiki or everysingledetailabouteverygunever.com.

The winner for bestest answer goes to Shadow Captain:

M4 is just a carbine version of the m16 - shorter barrel

USP is Polymer frame, metal slide

He wins this ribbon:

[murta369]

Re: Real steel questions

plus the m4 has the flat top reciver

[will.i.am_bakewell]

Re: Real steel questions

plus the m4 has the flat top reciver

nope it just depends on what variant!

the M4 and M16

Are different on the following things:

Barrel lengths
Weight
Muzzle velocity
Effective range

http://en.wikipedia.org/wiki/M4_carbine
http://en.wikipedia.org/wiki/M16_rifle

very nice specification bars on the right hand of the pages

[Abbadon101]

Re: Real steel questions

I wouldn't credit wikipedia as a reliable source as any tom dick and harry can edit it.

All Current M4 Carbine have flat top receivers as that was one of the requirements of the DOD issuing them. The Colt Modle 720 however doesn't and that is what the M4 is based off of.