Picatinny rails are not mil-spec (stuff doesn’t fit onto them).Doesn’t align correctly to the upper receiver.Attachment system sucks (too heavy, too many screws, etc).The rails look great when they come in…but something has always been off: I’ve tried out a bunch of great deals I’ve found at gun shows and especially on Amazon and Ebay.

Note…I don’t have any “cheap” rails on this list. Want the additional rail space? Go with the Troy Industries Quad Rail. The STNGR VYPR is the handguard that recently bumped Aero off my Best Bang-For-The-Buck handguard list. To get a better grasp on the best length for you, check out our guide to choosing the proper handguard length. I personally like ~12″ handguards with 16″ barrels since I use the c-clamp grip. Plus, you can choose any handguard length if you have the right low-profile gas-block for it to go over. Your best bet if you are building your own AR-15 upper.įree-floating handguards give you an accuracy advantage since it doesn’t contact the barrel…so your hand position and extra gadgets such as bipods don’t affect barrel harmonics. BCM-15-MLOK-Rail Best Free-Floating Handguards It used to be personal preference but recently USSOCOM (US Special Operations Command) released their results of testing.Īnd M-LOK is the clear winner due to much better impact test results.

The older “High Profile” upper receiver has a 3/16' wide top portion where the charging handle is installed.One of the first decisions you’ll make is which attachment system…M-LOK or KeyMod. Please download PDF to determine which receiver you have before purchasing: 308 COMPARISON The new “Low Profile” upper receiver has a 1/8' wide top portion where the charging handle is installed. PRE August 2009 model is 1.313' IMPORTANT: DPMS, BUSHMASTER & REMINGTON have two different height upper receivers. To properly match your receiver height, measure the distance from the barrel's centerline to the top of the receiver rail. How to tell what type of DPMS LR-308 receiver you have:Īugust 2009 changed the height of the top rail on the LR308 upper receiver. Aero Precision M5 uppers are DPMS High Profile pattern. Modular rail design for latest open source keymod design rails and accessories. Super Slim 1.75' outer diameter keymod forearm for DPMS 308 Rifle or M&P10 (choose low profile and add long ejection port rod). Midwest MI-308SS Keymod 12” or 15” LOW Profile DPMS.

Midwest industries keymod accessories