My Cart: 0 item(s)
AR-15 Vise Blocks – Upper & Lower Receiver Tools | Mounts Plus
AR-15 Vise Blocks
Secure Your Rifle. Build with Confidence.
Essential Receiver Support for Every Build & Repair
An AR-15 Vise Block is one of the most important tools for anyone building, cleaning, or maintaining an AR-style rifle. These rugged tools allow you to secure your upper or lower receiver in a vise without causing damage — so you can torque, install, or clean with confidence.
At Mounts Plus, we offer a full lineup of upper and lower receiver vise blocks, including clamshell-style blocks, magwell tools, combo kits, and billet-compatible designs. Trusted by DIY builders, professional armorers, and military technicians alike.
What Does an AR-15 Vise Block Do?
-
Secures upper receivers during barrel nut and handguard installation
-
Holds lower receivers for pin installs, trigger group work, or maintenance
-
Prevents marring, crushing, or damage from direct vise pressure
-
Speeds up builds and makes routine service easier and safer
📊 Compare AR-15 Vise Block Types
| Product Type | Fits | Best For | Notes |
|---|---|---|---|
| Upper Vise Block | Mil-spec uppers | Barrel nut torque, cleaning | Some models clamshell design |
| Lower Vise Block | AR-15 lowers | Pin installs, trigger upgrades | Often inserted via magwell |
| Magwell Block | AR-15 magwell | Cleaning & light work | Quick & easy to insert/remove |
| Combo Kit | Upper & Lower | Full builds, general maintenance | Best value & versatility |
Product Features to Look For
-
✅ Non-marring material (polymer, Delrin, or aluminum)
-
✅ Precise fit for mil-spec AR-15 receivers
-
✅ Some upper blocks work with billet receivers or monolithic uppers
-
✅ Magwell blocks allow vertical receiver positioning
Why Buy Your AR-15 Vise Block from Mounts Plus?
-
✅ Top-quality brands trusted by military & gunsmiths
-
✅ Compatible with most AR-15, M4, and mil-spec builds
-
✅ All products in stock & ready to ship
-
✅ Fast U.S. delivery & excellent customer support
-
✅ Serving the firearms community since 1994
Build & Maintain With Confidence
From first-time builders to experienced armorers, the right vise block saves time and prevents costly mistakes. Whether you're installing a free-float rail, cleaning your upper, or torqueing a barrel nut, you'll want your receiver held securely.
Choose the vise block that fits your workflow — and get it done right the first time.
Shop our full selection of AR-15 vise blocks below.
❓ Frequently Asked Questions
Q: What’s the difference between an upper and lower vise block?
A: Upper blocks hold your upper receiver for tasks like barrel installs. Lower blocks insert into the magwell and hold the lower receiver for pin and parts installation.
Q: Will these blocks work with billet receivers?
A: Some clamshell-style blocks are not compatible with billet uppers. Look for universal or open-top styles if you’re using billet or monolithic receivers.
Q: Can I use a magwell vise block for assembly?
A: Magwell blocks are great for basic cleaning and light tasks, but we recommend a full lower block for serious pin and trigger work.
Q: Do I need both an upper and lower block?
A: If you're doing a full build or frequent upgrades, a combo kit is your best option. It covers everything from barrel installs to trigger swaps.