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Phase 5 Weapon Systems Inc Lo-Pro Free Float Slope Nose Qual Rail w/M-LOK Up to 24% Off Plus Blazin' Deal w/ Free S&H — 4 models

Phase 5 Weapon Systems Inc 7.5 Inch Lo-Pro Slope Nose Free Float MLOK Rail, Steel Barrel Nut and Mounting Hardware Included, Black, 7.5 Inch, PH5LPSN75MLOK
Phase 5 Weapon Systems Inc Lo-Pro Slope Nose Handguard, AR-15, 10.5 in, M-LOK, Black, LPSN10.5 MLOK
Phase 5 Weapon Systems Inc 13in Lo-Pro Slope Nose Free Float Quad Rail With M-LOK, Black, LPSN13 MLOK
Phase 5 Weapon Systems Inc Lo-Pro Free Float Slope Nose Qual Rail With M-LOK 15 Inch Mil-Spec Finish
Phase 5 Weapon Systems Inc 7.5 Inch Lo-Pro Slope Nose Free Float MLOK Rail, Steel Barrel Nut and Mounting Hardware Included, Black, 7.5 Inch, PH5LPSN75MLOK
Phase 5 Weapon Systems Inc 7.5 Inch Lo-Pro Slope Nose Free Float MLOK Rail, Steel Barrel Nut and Mounting Hardware Included, Black, 7.5 Inch, PH5LPSN75MLOK
Phase 5 Weapon Systems Inc 7.5 Inch Lo-Pro Slope Nose Free Float MLOK Rail, Steel Barrel Nut and Mounting Hardware Included, Black, 7.5 Inch, PH5LPSN75MLOK
Phase 5 Weapon Systems Inc 7.5 Inch Lo-Pro Slope Nose Free Float MLOK Rail, Steel Barrel Nut and Mounting Hardware Included, Black, 7.5 Inch, PH5LPSN75MLOK
Phase 5 Weapon Systems Inc 7.5 Inch Lo-Pro Slope Nose Free Float MLOK Rail, Steel Barrel Nut and Mounting Hardware Included, Black, 7.5 Inch, PH5LPSN75MLOK
Phase 5 Weapon Systems Inc 7.5 Inch Lo-Pro Slope Nose Free Float MLOK Rail, Steel Barrel Nut and Mounting Hardware Included, Black, 7.5 Inch, PH5LPSN75MLOK
Phase 5 Weapon Systems Inc Lo-Pro Slope Nose Handguard, AR-15, 10.5 in, M-LOK, Black, LPSN10.5 MLOK
Phase 5 Weapon Systems Inc Lo-Pro Slope Nose Handguard, AR-15, 10.5 in, M-LOK, Black, LPSN10.5 MLOK
Phase 5 Weapon Systems Inc Lo-Pro Slope Nose Handguard, AR-15, 10.5 in, M-LOK, Black, LPSN10.5 MLOK
Phase 5 Weapon Systems Inc 13in Lo-Pro Slope Nose Free Float Quad Rail With M-LOK, Black, LPSN13 MLOK
Phase 5 Weapon Systems Inc 13in Lo-Pro Slope Nose Free Float Quad Rail With M-LOK, Black, LPSN13 MLOK
Phase 5 Weapon Systems Inc 13in Lo-Pro Slope Nose Free Float Quad Rail With M-LOK, Black, LPSN13 MLOK
Phase 5 Weapon Systems Inc 13in Lo-Pro Slope Nose Free Float Quad Rail With M-LOK, Black, LPSN13 MLOK
Phase 5 Weapon Systems Inc 13in Lo-Pro Slope Nose Free Float Quad Rail With M-LOK, Black, LPSN13 MLOK
Phase 5 Weapon Systems Inc 7.5 Inch Lo-Pro Slope Nose Free Float MLOK Rail, Steel Barrel Nut and Mounting Hardware Included, Black, 7.5 Inch, PH5LPSN75MLOK
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Phase 5 Weapon Systems Inc 7.5 Inch Lo-Pro Slope Nose Free Float MLOK Rail, Steel Barrel Nut and Mounting Hardware Included, Black, 7.5 Inch, PH5LPSN75MLOK
Phase 5 Weapon Systems Inc Lo-Pro Slope Nose Handguard, AR-15, 10.5 in, M-LOK, Black, LPSN10.5 MLOK
2 of 18 images
Phase 5 Weapon Systems Inc Lo-Pro Slope Nose Handguard, AR-15, 10.5 in, M-LOK, Black, LPSN10.5 MLOK
Phase 5 Weapon Systems Inc 13in Lo-Pro Slope Nose Free Float Quad Rail With M-LOK, Black, LPSN13 MLOK
3 of 18 images
Phase 5 Weapon Systems Inc 13in Lo-Pro Slope Nose Free Float Quad Rail With M-LOK, Black, LPSN13 MLOK
Phase 5 Weapon Systems Inc Lo-Pro Free Float Slope Nose Qual Rail With M-LOK 15 Inch Mil-Spec Finish
4 of 18 images
Phase 5 Weapon Systems Inc Lo-Pro Free Float Slope Nose Qual Rail With M-LOK 15 Inch Mil-Spec Finish
Phase 5 Weapon Systems Inc 7.5 Inch Lo-Pro Slope Nose Free Float MLOK Rail, Steel Barrel Nut and Mounting Hardware Included, Black, 7.5 Inch, PH5LPSN75MLOK
5 of 18 images
Phase 5 Weapon Systems Inc 7.5 Inch Lo-Pro Slope Nose Free Float MLOK Rail, Steel Barrel Nut and Mounting Hardware Included, Black, 7.5 Inch, PH5LPSN75MLOK
Phase 5 Weapon Systems Inc 7.5 Inch Lo-Pro Slope Nose Free Float MLOK Rail, Steel Barrel Nut and Mounting Hardware Included, Black, 7.5 Inch, PH5LPSN75MLOK
6 of 18 images
Phase 5 Weapon Systems Inc 7.5 Inch Lo-Pro Slope Nose Free Float MLOK Rail, Steel Barrel Nut and Mounting Hardware Included, Black, 7.5 Inch, PH5LPSN75MLOK
Phase 5 Weapon Systems Inc 7.5 Inch Lo-Pro Slope Nose Free Float MLOK Rail, Steel Barrel Nut and Mounting Hardware Included, Black, 7.5 Inch, PH5LPSN75MLOK
7 of 18 images
Phase 5 Weapon Systems Inc 7.5 Inch Lo-Pro Slope Nose Free Float MLOK Rail, Steel Barrel Nut and Mounting Hardware Included, Black, 7.5 Inch, PH5LPSN75MLOK
Phase 5 Weapon Systems Inc 7.5 Inch Lo-Pro Slope Nose Free Float MLOK Rail, Steel Barrel Nut and Mounting Hardware Included, Black, 7.5 Inch, PH5LPSN75MLOK
8 of 18 images
Phase 5 Weapon Systems Inc 7.5 Inch Lo-Pro Slope Nose Free Float MLOK Rail, Steel Barrel Nut and Mounting Hardware Included, Black, 7.5 Inch, PH5LPSN75MLOK
Phase 5 Weapon Systems Inc 7.5 Inch Lo-Pro Slope Nose Free Float MLOK Rail, Steel Barrel Nut and Mounting Hardware Included, Black, 7.5 Inch, PH5LPSN75MLOK
9 of 18 images
Phase 5 Weapon Systems Inc 7.5 Inch Lo-Pro Slope Nose Free Float MLOK Rail, Steel Barrel Nut and Mounting Hardware Included, Black, 7.5 Inch, PH5LPSN75MLOK
Phase 5 Weapon Systems Inc 7.5 Inch Lo-Pro Slope Nose Free Float MLOK Rail, Steel Barrel Nut and Mounting Hardware Included, Black, 7.5 Inch, PH5LPSN75MLOK
10 of 18 images
Phase 5 Weapon Systems Inc 7.5 Inch Lo-Pro Slope Nose Free Float MLOK Rail, Steel Barrel Nut and Mounting Hardware Included, Black, 7.5 Inch, PH5LPSN75MLOK
Phase 5 Weapon Systems Inc Lo-Pro Slope Nose Handguard, AR-15, 10.5 in, M-LOK, Black, LPSN10.5 MLOK
11 of 18 images
Phase 5 Weapon Systems Inc Lo-Pro Slope Nose Handguard, AR-15, 10.5 in, M-LOK, Black, LPSN10.5 MLOK
Phase 5 Weapon Systems Inc Lo-Pro Slope Nose Handguard, AR-15, 10.5 in, M-LOK, Black, LPSN10.5 MLOK
12 of 18 images
Phase 5 Weapon Systems Inc Lo-Pro Slope Nose Handguard, AR-15, 10.5 in, M-LOK, Black, LPSN10.5 MLOK
Phase 5 Weapon Systems Inc Lo-Pro Slope Nose Handguard, AR-15, 10.5 in, M-LOK, Black, LPSN10.5 MLOK
13 of 18 images
Phase 5 Weapon Systems Inc Lo-Pro Slope Nose Handguard, AR-15, 10.5 in, M-LOK, Black, LPSN10.5 MLOK
Phase 5 Weapon Systems Inc 13in Lo-Pro Slope Nose Free Float Quad Rail With M-LOK, Black, LPSN13 MLOK
14 of 18 images
Phase 5 Weapon Systems Inc 13in Lo-Pro Slope Nose Free Float Quad Rail With M-LOK, Black, LPSN13 MLOK
Phase 5 Weapon Systems Inc 13in Lo-Pro Slope Nose Free Float Quad Rail With M-LOK, Black, LPSN13 MLOK
15 of 18 images
Phase 5 Weapon Systems Inc 13in Lo-Pro Slope Nose Free Float Quad Rail With M-LOK, Black, LPSN13 MLOK
Phase 5 Weapon Systems Inc 13in Lo-Pro Slope Nose Free Float Quad Rail With M-LOK, Black, LPSN13 MLOK
16 of 18 images
Phase 5 Weapon Systems Inc 13in Lo-Pro Slope Nose Free Float Quad Rail With M-LOK, Black, LPSN13 MLOK
Phase 5 Weapon Systems Inc 13in Lo-Pro Slope Nose Free Float Quad Rail With M-LOK, Black, LPSN13 MLOK
17 of 18 images
Phase 5 Weapon Systems Inc 13in Lo-Pro Slope Nose Free Float Quad Rail With M-LOK, Black, LPSN13 MLOK
Phase 5 Weapon Systems Inc 13in Lo-Pro Slope Nose Free Float Quad Rail With M-LOK, Black, LPSN13 MLOK
18 of 18 images
Phase 5 Weapon Systems Inc 13in Lo-Pro Slope Nose Free Float Quad Rail With M-LOK, Black, LPSN13 MLOK

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Questions & Answers
Is this handguard compatible with a Nbs billet 9mm upper receiver? Manufacturer Answer

Yes. The Phase 5 LPSN MLOK rail should work with the NBS billet 9mm upper without issue.

by Phase 5 WSI, Manufacturer, July 29, 2026
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review
Good luck finding one better by MD, Verified Owner, September 24, 2021
A true demonstration of pride in one's craft. Phase 5 has mastered their manufacturing techniques and this handguard has it on full display. The fit is precise with a solid mounting setup. The coating is meteor proof (don't try to hit it with a burni...
Read More...
2/2 found this helpful
Helpful Positive Review
Great Looking Handguard by Brandon, October 6, 2020
This is a great handguard. The fit and finish are perfect. I dont know what the other review is talking about. yes, you do have to time the barrel nut but like he said, you have 35-80 foot pounds to work with. So I tightened it to that range, slid th...
Read More...
5/5 found this helpful
Helpful Positive Review
Nice, but order shims! by gospyro, Verified Owner, September 30, 2021
This is a nice looking rail. The fit* and finish and over all design looks great. *While there are a good number of locatinos that align with the receiver, I was unable to do so without the addition of shims. I would have given it 5 stars if it h...
Read More...
2/2 found this helpful
Helpful Positive Review
Works great! by JT, Verified Owner, November 17, 2020
If you know how to properly place/torque a barrel nut onto the upper receiver, it works perfectly fine. The barrel nut has multiple holes the screws can line into. It’s aesthetically pleasing, different compared to the regular “boxy” handguards.
3/3 found this helpful
Helpful Positive Review
Phase 5 hand guard by AR lover, April 15, 2020
Love the feel and looks on it. Phase5 has good product. I own a lot of there product including the barrel. The muzzle brake is great too. The handguard feel like holding a felt. This is one of the best products That is in the market including the pri...
Read More...
1/1 found this helpful
Helpful Positive Review
Strong, rigid, thin by Paul, June 10, 2017
This hand guard is top notch! Make no mistake! I would buy another tommorrow. Fit and finish are great. Easy to install and great looking. It did not get 5 stars because I had to buy the crows foot wrench separately from Phase 5. The wrench should be...
Read More...
2/4 found this helpful
Read All 16 Reviews

Quick and Easy Savings! Save on Phase 5 Products

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Blazin' Deal
Prices have been cut drastically on select models of this product as part of a special offer. These prices are so low that there's no double-dipping with coupons or any additional discounts - sorry about that. This offer won't last long, so don't miss out!
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4 Models Available

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made-in-usa-flag Made in USA

Help support American manufacturing! Marked models of this product have gone through rigorous review and been certified by the manufacturer as Made in the USA.

Product Info for Phase 5 Weapon Systems Inc Lo-Pro Free Float Slope Nose Qual Rail w/M-LOK

The 15in LO-PRO SLOPE NOSE M-LOK Free Float Quad Rail was developed to accommodate the features of our 7.5in LPSN quad rail to a longer 15in version. The LPSN15 M-LOK was inspired by beneficial features that shooters have requested and demanded from us and other manufacturers. M-LOK is a modular locking accessory mounting system that is a direct attachment method for hard mounting accessories to a negative space mounting point. Designed by Magpul Industries as an evolution of the MOE slot system used since 2007. The slender light weight design, longer nose, ease of installation and superior construction and finish quality are some of the features that we designed into this system. The LPSN15 M-LOK undergoes a rigorous extra de-burring process in order to ensure a smoother snag free finish. The details and level of care during the manufacturing of the LPSN15 M-LOK makes it the perfect choice for your AR-15 rifle build. Built-in QD mounts with internal stops. Inner diameter: 1.35in. Not compatible with .308image

WARNING: California`s Proposition 65

Specifications for Phase 5 Weapon Systems Inc Lo-Pro Free Float Slope Nose Qual Rail With M-LOK 15 Inch Mil-Spec Finish LPSN15MLOK:

Mfg Item Num:  LPSN15MLOK
Type:  ACCESSORIES - GUN ACCESSORIES - HANDGUARDS
Master Model Header:  Lo-Pro Slope Nose Quad Rail M-LOK

Features of Phase 5 Weapon Systems Inc Lo-Pro Free Float Slope Nose Qual Rail With M-LOK 15 Inch Mil-Spec Finish LPSN15MLOK:

  • Built-in QD mounts with internal stops.
  • Inner diameter: 1.35"
  • Overall Length:15 inches
  • Built-in QD mounts with internal stops
  • 6061 T6 aluminum
  • Low Profile sleek design
  • Light weight for improved mobility
  • Type III Hard Anodized Mil-Spec finish (black)
  • Not compatible with .308

Package Contents:

  • Phase 5 Weapon Systems Inc Lo-Pro Free Float Slope Nose Qual Rail With M-LOK 15 Inch Mil-Spec Finish LPSN15MLOK
  • Barrel Nut and Mounting Hardware

Phase 5 Weapon Systems Inc Lo-Pro Free Float Slope Nose Qual Rail w/M-LOK Orderable Models

List of Orderable Models

  • Phase 5 Weapon Systems Inc 7.5 Inch Lo-Pro Slope Nose Free Float MLOK Rail, Steel Barrel Nut and Mounting Hardware Included, Black, 7.5 Inch, PH5LPSN75MLOK , MPN: LPSN7.5 MLOK , UPC: 813318022752 , Code: 1U8-HZ-LPSN15MLOK-PH5LPSN75-MLOK
  • Phase 5 Weapon Systems Inc Lo-Pro Free Float Slope Nose Qual Rail w/M-LOK , MPN: LPSN15 MLOK , UPC: 813318022066 , Code: 1U8-HZ-LPSN15MLOK-LPSN15MLOK
  • Phase 5 Weapon Systems Inc Lo-Pro Slope Nose Handguard, AR-15, 10.5 in, M-LOK, Black, LPSN10.5 MLOK , MPN: LPSN10.5 MLOK , UPC: 813318024787 , Code: 1U8-HZ-LPSN15MLOK-LPSN10-5-MLOK
  • Phase 5 Weapon Systems Inc 13in Lo-Pro Slope Nose Free Float Quad Rail With M-LOK, Black, LPSN13 MLOK , MPN: LPSN13 MLOK , UPC: 813318024992 , Code: 1U8-HZ-LPSN15MLOK-LPSN13-MLOK

Phase 5 Weapon Systems Inc Lo-Pro Free Float Slope Nose Qual Rail w/M-LOK Unavailable & Discontinued Models

List of Unorderable Models

  • USED Phase 5 Weapon Systems Inc Lo-Pro Slope Nose Handguard, AR-15, 10.5 in, Picatinny, Black, LPSN10.5, EDEMO1, Used, Condition Fair , MPN: LPSN10.5-EDEMO1 , Code: 1U8-HZ-LPSN15MLOK-LPSN10-5-EDEMO1
  • USED, Phase 5 Weapon Systems Inc Lo-Pro Free Float Slope Nose Qual Rail w/M-LOK , MPN: LPSN15 MLOK-EDEMO , Code: 1U8-HZ-LPSN15MLOK-LPSN15MLOK-EDEMO-RE-B
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Last updated 2026-09-05 UTC.