+1-800-504-5897 Help Center Check Order Status
About Us Policies Reviews How To
Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

  • Entire Store
  • ...
  • Apparel & Footwear
  • Astronomy
  • Everything Else
  • Eyewear
  • Hunting Gear
  • Lab Equipment
  • Military Gear
  • Outdoor Gear
  • Photography Equipment
  • Police, EMS & Fire
  • Shooting
  • Sport Optics
  • Sports & Hobbies
TIP
Shopping Cart

Lockstep Arms - Magazine Baseplates, Mag Releases, Thread Protectors & Other Gun Parts — 11 products / 34 models

Lockstep Arms designs gun parts and accessories to enhance your firearm’s utility and ensure smooth performance with every use. Their selection of gun parts features magazine extensions that increase your AR-15’s capacity by five rounds where permitted, as well as standard magazine base plates and releases for pistols that help you reload more efficiently while adding some personalized flare to your firearm. Lockstep Arms also produces thread protectors to safeguard your threaded barrel when the muzzle device is removed and optic plate covers to hide the ugly gap left by some optic-milled slides.image

Shop online at OpticsPlanet today for incredible deals on gun accessories from top-rated brands. Browse our entire selection today to save big on everything from holsters and mag pouches to ear protection for shooting. Learn more about how to upgrade your build and buy the best parts for the job with our library of How-to Guides. Gear up with us today and get Free Shipping on most orders over $49.

Popular Categories

Image of Gun Parts category Gun Parts
Image of Pistol Parts category Pistol Parts
Image of Weapon Accessories category Weapon Accessories
Image of Magazines category Magazines
Image of Pistol Slides & Slide Parts category Pistol Slides & Slide Parts
Image of Magazine Extensions category Magazine Extensions
Image of Rifle Parts category Rifle Parts
Image of Rifle Magazine Extensions category Rifle Magazine Extensions
Image of AR15 Accessories category AR15 Accessories
Image of AR15 Front Grips category AR15 Front Grips
Image of Gun Support Grips category Gun Support Grips
Image of Handstop Grips category Handstop Grips

11 Products in Lockstep Arms

reset
Sort by
Most Popular +
  • Most Popular
  • Price: Low to High
  • Price: High to Low
  • Avg. Rating: High to Low
  • Price Per Count: Low to High
  • Price Per Count: High to Low
  • Most Reviewed First
  • Savings % Off
  • Bonus Bucks %: High to Low
  • Bonus Bucks %: Low to High
  • Newest First
  • A to Z
  • Z to A
Show
60 +
  • 20
  • 60
  • 120
  • 240
Image of Lockstep Arms Glock 43X/48 Mag Release 5 models Lockstep Arms Glock 43X/48 Mag Release (1) As Low As (Save Up to 72%) $8.49 Blazin' Deal
Image of Lockstep Arms Glock 43 Magazine Release 5 models Lockstep Arms Glock 43 Magazine Release (1) As Low As (Save Up to 79%) $6.37 Blazin' Deal
Image of Lockstep Arms Billet MOS Optic Plate Cover Lockstep Arms Billet MOS Optic Plate Cover List: $25.00 (Save 46%) $13.50 Blazin' Deal
Image of Lockstep Arms Lancer L5AWM Base Plate w/5 Base Plate 2 models Lockstep Arms Lancer L5AWM Base Plate w/5 Base Plate (3) As Low As (Save Up to 52%) $19.20 Blazin' Deal
Image of Lockstep Arms M-LOK Finger Stop Lockstep Arms M-LOK Finger Stop (1) List: $25.00 (Save 59%) $10.17 Blazin' Deal
Image of Lockstep Arms PMAG GEN M3 AR15 Base Plate Flat +0-Round Lockstep Arms PMAG GEN M3 AR15 Base Plate Flat +0-Round (2) List: $35.00 (Save $1.01) $33.99
Image of Lockstep Arms Springfield XDM Back Slide Plate 6 models Lockstep Arms Springfield XDM Back Slide Plate (2) As Low As (Save Up to 78%) $4.49 Blazin' Deal
Image of Lockstep Arms Springfield XDM Mag +0 Base Plate 4 models Lockstep Arms Springfield XDM Mag +0 Base Plate As Low As (Save Up to 85%) $4.49 Blazin' Deal
Image of Lockstep Arms Springfield XDM Cocked Indicator Guide 4 models Lockstep Arms Springfield XDM Cocked Indicator Guide As Low As (Save Up to 83%) $2.49 Blazin' Deal
Image of Lockstep Arms Glock 43 Magazine Base Plate +0-Round 3 models Lockstep Arms Glock 43 Magazine Base Plate +0-Round As Low As (Save Up to 78%) $6.70 Blazin' Deal
Image of Lockstep Arms Glock Gen 4-5 Magazine Release 2 models Lockstep Arms Glock Gen 4-5 Magazine Release (2) As Low As (Save Up to 70%) $9.01 Blazin' Deal
reset
Show
60 +
  • 20
  • 60
  • 120
  • 240

Deals View All

Featured: Inventory Liquidation

Lockstep Arms How To Guides View All

What Is an AICS Magazine? by Brett R.
Best AR Iron Sights of 2026 on OpticsPlanet by OpticsPlanet Product Expert
Best Laser Sights of 2026 on OpticsPlanet by OpticsPlanet Product Expert
OpticsPlanet's Hottest New Products for 2026 by Brett R.

Filter by:

Unfortunately, the item(s) selected is out of stock. Please update your specifications to see more results.

Deals

reset

Categories

reset

Brands

reset
Price
reset
From $
—
To $

    Made in USA

    reset

    Customer Reviews

    Related Links

    Compare (0)
    1 item has been added
    Add at least two items to compare