Magpul MBUS Pro Front Folding Sight
Mix and match across the range: 2 items save 5%, 3 save 10%, 4 or more save 15% on your whole basket.
Fits 1913 Picatinny top rails on AR-15/M4 pattern rifles. Pairs with any MBUS Pro rear sight.
Not sure it fits your rifle? Ask us before you order
The Magpul MBUS Pro Front Folding Sight is an all-steel backup iron sight for AR-15 and M4 rifles, clamping to any 1913 Picatinny top rail.
The backup sight that behaves like a primary — all-steel MBUS Pro engineering in its purest form.
The Magpul MBUS Pro Front Folding Sight (MAG275) is machined from steel, finished in corrosion-resistant black, and built around one uncompromising requirement: when it flips up, it must be exactly where you zeroed it. The lockup is free of play, the detents are positive, and the post presents a crisp sight picture that steel alone can keep true through years of knocks.
Folded, the MBUS Pro sits astonishingly low on the rail — among the slimmest steel sights made — so it disappears under magnified optics and co-witnesses correctly with red dots. Deployment is instant from either side. For duty rifles and serious builds, this is the difference between carrying backup sights and trusting them.
Fits 1913 Picatinny top rails on AR-15/M4 pattern rifles, mounted at the front of the rail with a single fastener. Make sure the front rail sits on the same plane as your rear sight position, and check clearance against your optic's height and objective. Pair it with any MBUS Pro rear, zero the set, and it will hold.
| Platform | AR-15 / M4 |
|---|---|
| Type | Folding front backup sight |
| Material | Steel |
| Finish | Black |
| Mount interface | 1913 Picatinny top rail |
| Brand | Magpul Industries |
| MPN | MAG275 |
Zero it once, trust it always. Order the MBUS Pro Front today — imported from the USA with all duties paid by us and dispatched tracked from the UK in 7–10 business days, with nothing to pay on delivery.
Explore more: Iron Sights & Backup Sights, AR-15 Parts or browse all Magpul.
| Platform | AR-15 / M4 |
|---|---|
| Type | Folding front backup sight |
| Material | Steel |
| Finish | Black |
| Mount interface | 1913 Picatinny top rail |
| Brand | Magpul Industries |
| MPN | MAG275 |
| Category | Iron Sights |
| Shipping weight | 0.2 kg |
| Barcode | 873750008370 |
£5 tracked UK delivery on every order via Royal Mail Tracked 24. Our products are ordered in from the manufacturer rather than held in UK stock, so please allow 7 to 10 business days (Monday to Friday, excluding bank holidays) from the date of your order for it to reach you. Tracking details are emailed on dispatch. UK delivery only.
You have 30 days from receiving your order to cancel it for any reason, then 14 days to send it back unused and in its original packaging. Faulty, damaged or incorrect items are replaced or refunded and we cover reasonable return postage. Refunds go back to your original payment method within 14 days of receiving the return.
It fits 1913 Picatinny top rails on AR-15/M4 pattern rifles, mounted at the front of the rail in the usual front sight position. It pairs with any MBUS Pro rear sight, such as the <a href="/products/magpul-mbus-pro-sight-rear-1">MBUS Pro Rear (MAG276)</a>. Make sure the front rail sits on the same plane as your rear sight position.
The MAG275 is all steel, which gives a sight that shrugs off knocks and keeps a slim folded profile under an optic. Polymer flip-ups such as the original MBUS front are lighter and come in colours, but steel is the harder-wearing option. It is a folding design, so it drops flat out of the way until you need it.
It folds flat against the rail, which is the point of a backup sight: it should not intrude on the view through your optic. Whether it clears your particular optic depends on that optic's height and objective, so check clearance before committing to a position. Elevation is set on the front post in the normal way when you zero.
A front sight is only useful with a matching rear, so budget for the pair unless you already run an MBUS Pro rear. The MBUS Pro line is black steel with no colour options. Other combinations are listed in <a href="/collections/magpul-mbus-sights-backup-iron-sights">Magpul MBUS sights</a>.
This sight leaves the United Kingdom with £5 tracked UK delivery in 7–10 business days and tracking is emailed when it ships. If it does not clear your optic or suit your rail, see our returns policy or <a href="/pages/contact">contact us</a> and we'll help sort it.
7 to 10 business days from the date of your order. Every order is sent Royal Mail Tracked for a flat £5 and you receive tracking details by email when it is dispatched.
Yes. We list only genuine parts and optics from the brands shown, ordered in from the manufacturer for your order.
Compatibility notes on this page come from the manufacturer. If you are unsure, email us with your make and model before ordering and we will check rather than guess.
Yes. Bundle & Save applies automatically in your basket: 5% off when you buy 2 items, 10% off at 3 items and 15% off at 4 or more. It works across the whole range, so you can mix and match, and there is no code to enter.
Yes — you have 30 days from delivery to cancel for any reason, as long as the item is unused and in its original packaging. See our returns policy for the details.
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