Tippmann Arms M4-22 Micro Elite Pistol. $599

All around this is an outstanding 22LR facsimile of a true mil spec .556 AR15, providing a worthy training tool. It garners accolades from all who review it, and for shooters who don't sniff at the capabilities of 22LR, it may be all you need as a primary weapon. I knew a master gunsmith once who told me his favorite rounds were 22LR and 45-70 GOV because together they covered every potential need...I've always agreed. This from the Tippmann WEBSITE:

The M4-22 Micro Elite Pistol is a premium .22 caliber semi-automatic AR styled pistol with aluminum upper and lower receivers and all the features of a true M4. The Micro Elite Pistol features the T5 Armbrace, 7 inch barrel, 5" aluminum MLok handguard  and weighs only 4.4 lbs.  This highly modifiable pistol has all the features as the M4-22 rifle but with a shorter 7" barrel.

Features and Specifications

• Semi-Automatic 22LR Rimfire
• T5 Armbrace
• 5" Aluminum MLoK Handguard 
• Nickel Plated Bolt
• Weighs only 4.4 lbs.
• 7” 4150 Solid Steel Barrel with Parkerized Finish
• Bolt Catch
• Bolt Release
• Your choice of 25, 15 or 10 Round Magazine
• Functional Forward Assist Button
• Aluminum Upper and Lower Receivers
• Charging Handle
• Easy Push Pin Disassembly
• Full Length Top Picatinny Rail
• Adjustable Flip Up Sights
• Shell Deflector
• 2-Position, Receiver Mounted Safety Lever
• 1/2 x 28 Threaded A2 Birdcage
• 4 ½ Pound Trigger Pull
• Fully Functional Bolt Dust Cover
• Mil-Spec FCG (With the exception of the Safety lever. It is proprietary.)
• Allows For Drop in Trigger Assemblies
• Standard “bicycle lock” Storage Safety
• Gen2 Grip
• Ambidextrous Sling Adapter Plate
• Compatible With Most Standard AR15 Components and Accessories 
• Owner’s Manual